Easel



FIG. 1 is a perspective view of an easel showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevational view thereof; and

FIG. 5 is a top plan view thereof. 

The ornamental design for an easel, as shown and described. 